1 /* Determine the number of screen columns needed for a string. 2 Copyright (C) 2000-2004 Free Software Foundation, Inc. 3 4 This program is free software; you can redistribute it and/or modify 5 it under the terms of the GNU General Public License as published by 6 the Free Software Foundation; either version 2, or (at your option) 7 any later version. 8 9 This program is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 GNU General Public License for more details. 13 14 You should have received a copy of the GNU General Public License 15 along with this program; if not, write to the Free Software Foundation, 16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ 17 18 #include <stddef.h> 19 20 /* Avoid a clash of our mbswidth() with a function of the same name defined 21 in UnixWare 7.1.1 <wchar.h>. We need this #include before the #define 22 below. 23 However, we don't want to #include <wchar.h> on all platforms because 24 - Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before 25 <wchar.h>. 26 - BSD/OS 4.1 has a bug: <stdio.h> and <time.h> must be included before 27 <wchar.h>. */ 28 #if HAVE_DECL_MBSWIDTH_IN_WCHAR_H 29 # include <wchar.h> 30 #endif 31 32 33 #ifdef __cplusplus 34 extern "C" { 35 #endif 36 37 38 /* Optional flags to influence mbswidth/mbsnwidth behavior. */ 39 40 /* If this bit is set, return -1 upon finding an invalid or incomplete 41 character. Otherwise, assume invalid characters have width 1. */ 42 #define MBSW_REJECT_INVALID 1 43 44 /* If this bit is set, return -1 upon finding a non-printable character. 45 Otherwise, assume unprintable characters have width 0 if they are 46 control characters and 1 otherwise. */ 47 #define MBSW_REJECT_UNPRINTABLE 2 48 49 50 /* Returns the number of screen columns needed for STRING. */ 51 #define mbswidth gnu_mbswidth /* avoid clash with UnixWare 7.1.1 function */ 52 extern int mbswidth (const char *string, int flags); 53 54 /* Returns the number of screen columns needed for the NBYTES bytes 55 starting at BUF. */ 56 extern int mbsnwidth (const char *buf, size_t nbytes, int flags); 57 58 59 #ifdef __cplusplus 60 } 61 #endif 62
